Which piece of lab equipment would you need to measure the volume of an irregularly shaped object, like a rock?
Responses
Meter stick
Meter stick
Triple beam balance
Triple beam balance
Graduated cylinder
Graduated cylinder
Thermometer
Incorrect Answer: Thermometer
Correct Answer: Graduated cylinder
What is the dependent variable in this experiment?
Responses
type of soil used
type of soil used
amount of water used
amount of water used
length of sunlight exposure
length of sunlight exposure
growth of the bean plants
Correct Answer: growth of the bean plants
Which is the best conclusion from the data shown in the graph?
Responses
The damming of the river caused a decline in the population of hybrid sticklebacks.
The damming of the river caused a decline in the population of hybrid sticklebacks.
The decline in open-water sticklebacks caused an increase in bottom-dwelling sticklebacks.
The decline in open-water sticklebacks caused an increase in bottom-dwelling sticklebacks.
The number of hybrid sticklebacks has increased since the dam was built.
The number of hybrid sticklebacks has increased since the dam was built.
The populations of both open-water and bottom-dwelling sticklebacks rose after the dam was built.
The populations of both open-water and bottom-dwelling sticklebacks rose after the dam was built.
Correct Answer: The damming of the river caused a decline in the population of hybrid sticklebacks.
The correct piece of lab equipment that you would need to measure the volume of an irregularly shaped object, like a rock, is a graduated cylinder. Here's how you can use a graduated cylinder to measure the volume:
1. Fill the graduated cylinder with a known amount of water, making sure to note the initial volume. For example, if you fill it to the 100 mL mark, record this value.
2. Carefully drop the irregular object (in this case, a rock) into the graduated cylinder, making sure it is completely submerged in the water. Take note of the new water level.
3. Calculate the volume of the rock by subtracting the initial volume (100 mL in our example) from the final volume. For instance, if the new water level reaches 150 mL after adding the rock, the volume of the rock would be 150 mL - 100 mL = 50 mL.
By using a graduated cylinder, you can easily measure the volume of irregularly shaped objects by determining the displacement of water they cause.